Patents by Inventor Carlos Manuel Alvarez Perez

Carlos Manuel Alvarez Perez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of crystalline and solvent free iohexol
    Patent number: 6469208
    Abstract: The object of the present invention is an industrial process for the purification and removal of residual solvents from iohexol, based on the suspension of crystalline iohexol, eventually containing residual solvents above 100 ppm, in a fluid wherein it has a low solubility, followed by heating, filtration and drying. The process allows the formation of crystalline iohexol with no residual organic residual solvent above 100 ppm and with an increased purity level.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: October 22, 2002
    Assignee: Hovione Inter Ltd.
    Inventors: Guido Du Boulay Villax, Alexandre Jose Ganchas De Carvalho, Carlos Manuel Alvarez Perez